—How did she get infected? —She ____ the viruses without any protection.
#101750
A
exposed to
B
had exposed to
C
was exposed to
D
has exposed to
推荐题目
－Have you seen the film Lost in Thailand?－Oh, no. I ___ my homework all day yesterday.
#99960
A
had done
B
did
C
have done
D
was doing
I’m terribly sorry for being late, but I _____ the wrong bus.
#104116
A
catch
B
had caught
C
caught
D
catching
He will stop showing off, if no notice ＿＿ of him.
#104433
A
is taken
B
will be taken
C
takes
D
has taken
Experiments of this kind in both the U．S．and Europe well before the Second World War．
#102432
A
have conducted
B
have been conducted
C
had conducted
D
had been conducted